Image Processing Device Color Difference Offset Parameter Set Deblocking Filter
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Solution Overview
Problem
Existing image processing techniques face difficulties in adjusting deblocking filter strength between luminance and color difference components, leading to challenges in improving the subjective quality of decoded images, especially when dealing with mixed block sizes and noise suppression.
Innovation Solution
An image processing device and method that apply a deblocking filter to the color difference component of decoded images using a color difference offset parameter set, allowing for separate adjustment of filter strength based on block size and component type, enabling improved image quality by setting multiple offset parameter sets for luminance and color difference components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single set of offset parameters is used for both luminance and color difference components, then the device complexity is reduced, but the ability to adjust filter strength independently for each component is lost, resulting in inability to improve subjective image quality when different components require different filter strengths
Solution Approach 1:
The patent segments the offset parameters into separate sets for luminance components and color difference components. This allows independent adjustment of filter strength for each component type, enabling the system to handle cases where different components require different filtering approaches without increasing overall system complexity significantly.
Solution Approach 2:
The patent applies local quality by allowing different offset parameter sets to be used for different component types (luminance vs. color difference) and potentially different regions. This enables tailored filter strength adjustment for specific components or regions where it is needed, rather than applying uniform filtering across all components.
2Object-affected harmful factors
If deblocking filter strength is increased to suppress block noise, then noise suppression is improved, but image details may be lost due to excessive filtering
Solution Approach 1:
The patent applies different filter strengths to different components based on their specific needs. Color difference components can receive different filtering treatment compared to luminance components, allowing noise suppression where needed while preserving important image details and characteristics in each component type.
Solution Approach 2:
The patent changes the parameters (offset values) based on the component type and local image characteristics. By adjusting offset parameters dynamically, the system can adapt filter strength to suppress block noise in appropriate regions while maintaining image quality and preserving details in other regions.
Data Source
AI summary
The present technology relates to an image processing device and an image processing method enabling the image quality to be improved. A color difference offset parameter set used when applying a deblocking filter to a color difference component of a decoded image obtained by decoding a bitstream is set. The image is encoded to generate a bitstream including the color difference offset parameter set. The bitstream is decoded to generate a decoded image. A deblocking filter is applied to the color difference component of the pixels near a block boundary of the decoded image using the color difference offset parameter set. The present technology can be applied when encoding and decoding an image.